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Moderate earthquake 5.5 mag, 69 km SSE of Adak, Alaska



Earthquake location 51.269S, -176.4404WA moderate earthquake with magnitude 5.5 (ml/mb) was reported 69 km SSE of Adak, Alaska (43 miles) on Tuesday. The epicenter of the earthquake was roughly 12.86 km (8 miles) below the earth’s surface. Exact time and date of earthquake 04/04/17 / 2017-04-04 22:08:40 / April 4, 2017 @ 10:08 pm UTC/GMT. Event id: us10008ef7. Ids that are associated to the earthquake: at00onwo6e, us10008ef7, ak15684591. The temblor was detected at 10:08:40 / 10:08 am (local time epicenter). A tsunami warning has been issued near Adak in Alaska (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -176.4404 West, latitude 51.269 North, depth = 12.86 km.

Each year there are an estimated 1320 moderate earthquakes in the world. In the past 24 hours, there have been seven, in the last 10 days seven, in the past 30 days eleven and in the last 365 days one hundred and thirty-seven earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

Did you feel the quake?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 69 km SSE of Adak, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 5.5 mb The magnitude for the event.
Longitude -176.4404° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.269° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 12.86 km Depth of the event in kilometers.
Place 69km SSE of Adak, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-04-04 22:08:40 Time when the event occurred. UTC/GMT
Updated 2017-04-04 22:36:17 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 2.7 The maximum reported intensity for the event.
MMI 3.63 The maximum estimated instrumental intensity for the event.
Alert Level green The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status reviewed Indicates whether the event has been reviewed by a human.
Tsunami 1 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 466 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at,us,ak, A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.632 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.97 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 104 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mww The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us10008ef7 Id of event.
Event Code 10008ef7 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00onwo6e,us10008ef7,ak15684591, A comma-separated list of event ids that are associated to an event.

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